Elevator.



UNITED STATES.

Patented May 12, 1903.

PATENT QFFIGE.

ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 728,100, dated May 12, 1903. Application filed November 29,1902. Serial No. 133,228. (No model.)

T0 at whom it may concern.-

Be it known that I, JAMES T. HAM, a citizen of the United States, residing at Mineralwells, in the county ofPalo Pinto and State of Texas,

I have invented new and useful Improvements in Elevators, of which the following is a specification.

My invention relates to new and useful improvements in elevators, and more especially to devices of this character adapted for hoistin g water, grain, or other like material;

The object of the invention is to construct With the above and other-objects in viewthe invention consists in the novel construction and arrangement of the several parts, which will be more fully hereinafter described and claimed.

In the drawings, Figure 1 is a side elevation of the elevator mounted upon a suitable derrick. Fig. 2 is a front elevation thereof. Fig. 3 is an enlarged elevation of a sprocketwheel and showing a chain mounted thereon. Fig. 4 is an enlarged section through the upper end of the elevator and showing one of the buckets partly turned. Fig. 5 is an inner elevation of a portion of one of the side beams of the derrick ahd showing a supportingroller. Fig. 6 is a detail view of said rollerdetached.

Referring to the figures by numerals of reference, 1 l are side beams of a derrick held in an inclined position by means of brace beams 2. These beams may be connected or braced in any desired manner, and a horizontal shaft 3 is journaled in the beams 1, near the lower ends thereof, while a second shaft 4 is journaled therein near the upper ends. Near each end of each shaft is secured a sprocket-wheel 5, which is preferably square, as shown, and provided at the center of each edge with a recess 6. These recesses are adapted to receive rollers 7, mounted near the ends of rods 8, which connect chains 9 and at the same time serve as pivots for the links of said chains. Upon every other rod 8 is hung a bucket 10, and the rollers 7 are arranged loosely between themand the chains 9 and are prevented thereby from moving laterally. These buckets are preferably provided with walls arranged at right angles to their fiat bottoms, and the walls 11 located nearest the center of the sprockets as the buckets rise are preferably higher than the opposite walls,

and the upper edges of the sides are inclined from one to the other, thereby forming spouts 12, through which the material contained in the buckets is adapted to be discharged. The buckets are raised by revolving the shaft 4. This can be done by means of a crank 13 or by means of a pulley 14, about which a belt can be placed. 'As the shaft revolves the corners of the sprockets project between the rods 8 andthe rollers'7 moveinto and out of As the buckets are moved ofare brought into contact with the shaft 4,

,and the same are tilted over in such a manner "as to discharge the contents thereof through spouts '12.

Brackets 15 are arranged upon the beams 1, and rollers 16 are journaled therein. These rollers serve to support the chain 9 when in an inclined or horizontal position.

'If'desired, the derrick'may be dispensed with when the chain is arranged perpendicularly. In such case it is merely necessary to provide bearings for shafttl, andthe chains can then hang suspended from said shaft. The

lower shaft '3 can be used without bearings,

"as the sprockets thereof will retain the shaft in position within the chain. This latter arrangement, by means of which the derrickis dispensed with, is especially adaptable Where it is desired to hoist water from wells, &c.

In the foregoing description I have shown the preferred form of my invention; but I do not desire to limit myself thereto, as I am aware that modifications maybe made therein Without'departing from the spirit or sacriiicing any of the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of the invention.

Having thusfully'described theinvention,

1 what is claimedas new is 1. The combination with a revoluble shaft having sprockets; of buckets, chains at opposite sides of the buckets, rods forming pivots for the chains and extending through the sides of the buckets, rollers journaled upon the rods at points between the buckets and chains and adapted to bear upon the sprockets, stationary brackets, and rollers journaled therein and adapted to support and prevent sagging of the chains.

2. The combination with a revoluble shaft having square sprockets and a recess in the center of each edge of said sprockets; of chains, rods connecting the chains and serving as pivots for the links thereof, buckets through which the rods extend, said buckets being adapted to contact with and be successively tilted by the shaft, rollers journaled on the rods at points between the buckets and chains and adapted to successively engage the recesses in the sprockets, and means for supporting the chains to prevent sagging thereof.

3. The combination with a supportingframe, of shafts journaled therein, square sprockets secured to the shafts and havinga recess in the center of each edge, endless chains extending over and under the shafts respectively, rods connecting the chains and serving as pivots for the links thereof, rollers upon the rods adapted to successively engage the recesses in the sprockets, buckets suspended from alternate rods and adapted to be successively tilted by one of the shafts, and rollers upon the frame forming bearings for the chain and adapted to prevent sagging thereof.

JAMES '1. HAM.

Witnesses:

R. E. HENDRY, WM. WORM. 

